Improvement in lubricators



F/Wasman /hzp'oZz' Cfu/0, N0. 120,660. Patented Nov-7,1871.

` AM. fwarn-L/rlmsRAFf/[c ca N k fassen/ff mafias] UNITED STATES PATENTOEEICE.

DANIEL F. MOSMAN, OF CHELSEA, MASSACHUSETTS, ASSIGNOR TO HIMSELF ANDLEONARD ATWOOD, OF NEW YORK CITY.

IMPROVEMENT IN LUBRICATORS.

Specication forming part of Letters VPatent No. 120,660, dated November7, 1871.

To all whom it may concern:

Be it known that I, DANEEL F. MosMAN, oi Chelsea, in the county ofSuffolk and State of Massachusetts, have invented certain Improvementsin Oil-Cups or Lubricators; and I do here- Y by declare that thefollowing, taken in connec- "as fast as, may be required to insure aproper lubrication, the eduction-passage being generally controlled byan adjustable plug in the inside of the cup. Such an oil-cup is alwaysconnected to the engine or other mechanism to which it is to furnish thelubricant by a metal screwstem, said stem being the tube through whichthe oilpassage extends 5; and this metal coupling 4and eduction-tube hasalways been connected to the glass of the cup by a iianged extension ofthe stem or by plaster or other inelastic cement, or by otherintervening rigid material, which permits no yield between the glass andthe machine to which the stem is affixed. Not only'are these methods ofconstruction expensive, but they result in a great breakage of the cups;and the purpose of my improvement is twofold-first, to make a lessexpensive and more simple construction, and next to make a cup free fromthe liability to breakage inseparable from the present constructions. Inattaining these objects I prefer to 'employ an elastic stopper extendinginto the mouth of the glass-cup, (said stopper being preferably made ofcork,) and to pass the stem directly through this stopper; and myinvention consists primarily in a glass oil-cup, the eduction-tube andattaching-screw stem of which is connected to the glass by a cork orsimilar elastic stopper inserted in the mouth of the cup and having thestem extending through it. The cupend of the stem may be screw-threaded,and may screw through the stopper, as a means of connecting them; but Iprefer to hold the stem in place relatively to the glass, or vice versa,by a metal spring-band or girth-spring extending around the cup, thisband being preferably held in place by scores or grooves made in theopposite sides of the glass cup. The spring-band for holding the partstogether and scores formed in the glass are features of my invention.Another feature of the invention consists in combining with theeduction-tube or stem a flow-controlling plug, located between the cupand the attaching screw-threaded end of the eduction-tube, andaccessible outside of the cup. The girth-spring may be used without theelastic stopper in the mouth of the cup, the mouth being made only largeenough for the entrance of the end of the eduction-tube, and the tube orstem having a ange, which is held against a flat packing-ring(interposed between it and the end of the cup) by a spring-girth; but Iprefer the cork or elastic stopper. y

The drawing represents oil-cups embodying my improvements. At A, B, and:C I show, partly in section and partly in elevation, the severalconstructions embodying the invention.

a denotes the glass cup, formed with only one opening, b, said openingbeing at the bottom of the cup. c denotes the metal stem or eductiontubeythrough the central passage d, in which the lubricant iiows from thecup to the mechanism to be lubricated; o being the screw-threaded nippleor outer end of the tube by which the cup is attached to the mechanism.At A I show the specific form preferred by me in carrying myimprovements into practice. In this view the opening or mouth of theglass cup or oil-reservoir is made large enough to receive a cork orsimilar elastic stopper, f, having a central hole,

g, into which the upper end h of the eductionstem or tube is pressed,the stem having a flange, j, which is drawn up against the cork by agirth or wire spring, t', extending around the cup, and having itsopposite ends fastened to opposite sides ofthe flange, the wire sinkinginto scores 7c made in the opposite sides of the glass cup, and thestress of a spring or coil, Z, pressing upward the iiange, packing ittightly against the cork and the cork tightly into the mouth of the cup.The cork is compressed when inserted, as in corking a bottle, and thepacking of the iiange against it seals the cup or renders it imperviousto leakage or to escape-of the oil, except through the metal stem. Itwill be obvious that this construction is very simple, eifective, andinexpensive, and that the cup can be removed for recharging with oilwith the utmost ease, as the spring-band has simply to be slipped fromplace and the stem drawn from the cork or stopper. The elasticity of thestopper renders it impossible to break the glass by the jar of themachinery to `which the cup is attached, and the cup is in every otherrespect as enduring as if the eduction-stem were connected to the glassby a metal or other rigid connection. At B the contractile band orgirth-spring is dispensed With, the inner end of the eduction-stem beingscrew-threaded, as seen at m, with a taper thread, that, screwing intothe cork, expands it outwardly against the sides or rim of the mouth,and thereby secures both cork and stem. At C I dispense with the corkand place a flexible washer or at ring, u, between the end ofthe glasscup and the flange o of the stem, the contractile band or girth-spring'i drawing the ange tightly against the washer and the washer againstthe cup, and thereby effecting a tight or impervious joint. In this casethe glass` cup is thickened at the mouth end, as seen at p, leaving acentral passage, g, only large enough to receive the inner end r of theeduction-stem. For most purposes, however, I prefer the constructionshown at A. At D I show the glass reservoir and the score lc in one ofits sides, the two scores being preferably formed in the glass in theact of making the reservoir. Between the screw-threaded outer end ofeach stem and the glass reservoir I make the stem with provisions forturning it by a wrench to apply and remove the cup; and in this part ofthe stem, or so as to come between the mechanism to which the cup isapplied and the bottom of the reservoir, I apply a screw-plug, s, which,passing through the stem to the oil-passage, enables the flow of oil tobe adjustably controlled at all times without removal of the cup. Inremoving the cup for recharging it with oil I prefer not to remove thestem with the reservoir, but to detach the reservoir from the stem. Now,as the open end of the reservoir is lower-most the oil will iiow from itwhen detached unless provision is made for arresting the flow. To effectthis I apply on the -top of the stopper a valve, t, hinged to thestopper and held up by the end of the stem. When the reservoir is beingdetached from the stem this valve self-closes and no oil can escape; butwhen the iilled reservoir is again applied to the stem the inner end ofthe stem lifts the valve, as seen in Figure A, and the oil can then flowthrough the tube. To permit free entrance of the oil into the tube,unobstructed by the valve, the end of the tube may be slit, as seen atu.

I claiml. In combination with the glass reservoir and metal stem, acontractile band or girth-spring, i, substantially as described.

2. The scores or grooves 7c in the glass reservoir for receiving thegirth-spring wire, substantially as described.

3. In combination with the oil-reservoir and stopper and theeduction-stem, a valve which closes the stopper-passage when thereservoir is detached from the stem and is opened by the stem when thereservoir and stem are con- Witnesses FRANCIS GoULD,

M. W. FROTHINGHAM. (87)

